Study English

This study aimed to evaluate the ecological characteristics of three specific cassava varieties in the Northern provinces of Vietnam. Particularly, the morphological descriptors of each cassava variety were obtained. Then, we analyzed the primary and secondary anatomical characteristics of the stems and leaves of cassava plants.

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This study identifies 38 endangered and rare plant species. Among them, 20 species in Vietnam Red Data Book 2007; 20 species belong to Decree No. 84/2021/ND-CP; 16 species belong to Appendix II of CITES (2024), and 4 species belong to IUCN (2024). Simultaneously, this study added summary information about the conservation status, life forms, geographical factors, and uses of 38 plant endangered and rare species in Me Linh Station for Biodiversity, Vinh Phuc province.

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The study of second-order optimality conditions is one of the most important topics in optimization theory and attracting the attention and interest of many authors. In this paper, we introduce a novel solution concept called “essential local efficient solutions of second-order” for nonconvex constrained multiobjective optimization problems.

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Nowadays, biodiesel attracts much attention since it is renewable, sustainable, and can replace fossil fuels. CaO was a suitable heterogeneous catalyst for transesterification reaction to produce biodiesel. In this study, blue crab shell was recycled as the CaO source.

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This study was done to investigate the phytochemicals of plants of Ceratophyllum demersum grown in Lam Dong Province. Five compounds, cyclocolorenone (1), 1α-hydroxycyclocolorenone (2), lupeol (3), betullinic acid (4), and chakyunglupulin B (5) were isolated from the ethyl acetate extract of Ceratophyllum demersum.

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This study aims to determine the various strains of yeast and filamentous fungi in traditional alcohol yeast cake from Hai Hau district, Nam Dinh province. By traditional laboratory techniques such as isolation on YPD agar, observation of colony morphology as well as cell characteristics by microscopy, combined with molecular biology method to sequence ITS region 03 strains of yeast Saccharomyces cerevisiae CN1, CN2, and NM3 were identified: 01 pseudo-strain yeast Saccharomycopsis fibuligera NM02 and 01 strain of filamentous fungi Rhizopus microsporus NS04.

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This study investigated the influence of culture media and culture time on the antioxidant and α-glucosidase inhibitory activities of the methanol extract obtained from the mycobiont of Graphis handelii. Different culture media, including MIX, PDA, and SAB4%, were employed to culture the mycobiont, and the biomass was harvested during different culture periods (4, 8, and 12 weeks).

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Stictic acid, a depsidone in many lichen species, is a potentially bioactive compound. Derivatives of stictic acid were synthesised by halogenation or esterification. However, the effects of these conditions on the decomposition of stictic acid have yet to be studied. Hence, the modification of stictic acid was investigated using an AlCl3 catalyst and dimethylformamide solvent.

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The present study provides information on the otolith morphometry of nine species of gobies (in three families, i.e., Eleotridae, Gobiidae, and Oxudercidae) caught in the Ba Lat estuary of the Red River in 2019. Otolith morphology of species in one family resembles, but it is clearly different between species in the same genus.

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This study is based on qualitative methods: analysis and synthesis of documents with research content related to integrated teaching or the ability to apply knowledge and skills; observation of groups of 3rd grade students in the process of teaching integrated topics. The article focuses on clarifying perspectives and levels of integrated teaching; concepts and expressions of the ability to apply knowledge and skills.

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This research investigates the effective integration of Python programming and visual aids in teaching mathematics at high schools in the Mekong Delta region. Recognizing the transformational power of technology in education, the study utilizes Python's capabilities to design interactive and engaging visual tools for mathematics instruction.

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Photoluminescent composites consisting of a photoluminescent material dispersed in a suitable matrix have been applied in many applications, such as light-emitting diodes, solar concentrators, and anticounterfeiting inks. In this study, we have demonstrated a one-step method to prepare homogeneous composites by inducing the formation of in-situ photoluminescent centers in a stable matrix.

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The study aims to identify factors affecting financial sustainability in community tourism development in the Northwest region. Survey data were collected from 135 tourism business households and individuals with direct and indirect income from tourism activities in the community tourism village in the Northwest region.

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In this article, the author’s objective is to use bibliometrics of scientific publications on slow learner education indexed in the Scopus database in the past time. The two main objectives include (a) a summary of the general characteristics and trends of scientific publications, the most crucial source journals, and the most effective scholars; (b) an analysis of international cooperation among countries in this field.

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This paper aims to investigate environmental factors that motivate English-majored students to learn speaking skills. Data collected from questionnaires with 130 English majored-students and focused-group interviews with eight participants were thoroughly analyzed with the descriptive analysis in SPSS.26, and the thematic analysis method, respectively.

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This study explores digital competence development among students at the Faculty of Economics and Business Administration, Hung Vuong University, in the context of the Fourth Industrial Revolution. Using surveys and statistical analyses, it evaluates skills in information management, communication, content creation, safety, and problem-solving.

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This study evaluates the current status and potential of cinnamon production regions in Vietnam that adhere to organic standards in Dam Ha district, Quang Ninh province. Organic cinnamon production not only enhances economic value but also contributes to environmental protection and ecological sustainability.

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The study aims to analyze tourists’ perceptions of Ho Chi Minh City tourism through text mining methods to analyze the sentiment of comments on a promotional video about the city’s tourism featured on Expedia’s YouTube channel. The results show that the prevailing sentiment is positive, emphasizing experiences as key factors contributing to the city’s appeal.

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This study proposes an improved optimization algorithm, combining a chaotic search function and the Runge Kutta optimizer, to address the optimal power dispatch problem for EVCS integrated with Vehicle-to-Grid technology in Distribution Networks featuring Distributed Generation and Battery Energy Storage Systems.

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In this study, we synthesized YPO4:x%Tb3+ using the combustion synthesis method and investigated the effects of annealing temperature and dopant concentration on the structural, morphological, and optical properties of the material.

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